| Ukiah to Devnya | 6,459.88 mi (10,396.18 km) |
| Ukiah to Dimitrovgrad | 6,494.98 mi (10,452.66 km) |
| Ukiah to Dobrich | 6,442.55 mi (10,368.28 km) |
| Ukiah to Dospat | 6,489.87 mi (10,444.43 km) |
| Ukiah to Dupnitsa | 6,428.52 mi (10,345.71 km) |
| Ukiah to Elhovo | 6,507.25 mi (10,472.41 km) |
| Ukiah to Etropole | 6,412.08 mi (10,319.25 km) |
| Ukiah to Gabrovo | 6,437.87 mi (10,360.75 km) |
| Ukiah to Gorna Oryahovitsa | 6,428.48 mi (10,345.65 km) |
| Ukiah to Gotse Delchev | 6,485.65 mi (10,437.64 km) |
| Ukiah to Harmanli | 6,508.54 mi (10,474.49 km) |
| Ukiah to Haskovo | 6,501.67 mi (10,463.43 km) |
| Ukiah to Ihtiman | 6,432.95 mi (10,352.84 km) |
| Ukiah to Isperih | 6,413.87 mi (10,322.13 km) |
| Ukiah to Kardzhali | 6,515.41 mi (10,485.54 km) |
